Pertanyaan

Nilai dari

Nilai dari $\style{font-size:14px}{\begin{array}{rcl}&&\sin\end{array}\begin{array}{rcl}&&\;\end{array}\begin{array}{rcl}&&75\end{array}\begin{array}{rcl}&&\textdegree\end{array}\begin{array}{rcl}&&-\end{array}\begin{array}{rcl}&&\sin\end{array}\begin{array}{rcl}&&\;\end{array}\begin{array}{rcl}&&15\end{array}\begin{array}{rcl}&&\textdegree\end{array}\begin{array}{rcl}&&+\end{array}\begin{array}{rcl}&&\cos\end{array}\begin{array}{rcl}&&\;\end{array}\begin{array}{rcl}&&45\end{array}\begin{array}{rcl}&&\textdegree\end{array}\begin{array}{rcl}&=&\end{array}\begin{array}{rcl}&&.\end{array}\begin{array}{rcl}&&.\end{array}\begin{array}{rcl}&&.\end{array}}$

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Klaim

S. Indah

Master Teacher

Mahasiswa/Alumni Universitas Lampung

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B.

Pembahasan

Jadi, jawaban yang tepat adalah B.

$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sin space 75 degree minus sin space 15 degree plus cos space 45 degree end cell equals cell 2 cos open parentheses fraction numerator 75 degree plus 15 degree over denominator 2 end fraction close parentheses sin open parentheses fraction numerator 75 degree minus 15 degree over denominator 2 end fraction close parentheses plus cos 45 degree end cell row blank equals cell 2 cos space 45 degree space sin space 30 degree plus cos space 45 degree end cell row blank equals cell 2 times 1 half square root of 2 times 1 half plus 1 half square root of 2 end cell row blank equals cell 1 half square root of 2 plus 1 half square root of 2 end cell row blank equals cell square root of 2 end cell end table end style$

Jadi, jawaban yang tepat adalah B.